... time. 4.1500-2000 Hours guarantee 5.ISO9001:2008 1.Products Material:50MnHigh Hardness:HRC53-58Color:Black or YellowTechnique:Forging ... EX60, EX150, EX100M, EX100, EX120, EX150, EX200-1/2/3,EX220, EX300-1/3/5, EX400,UH0423CaterpillarE110B/E120B, E312, E325, E200B ,E320, E240 ... 39SamsungSE210, SE240,SE280For more details can contact with us. Sell HITACHI EX400 track roller bottom roller lower roller